6.
    发明专利
    未知

    公开(公告)号:DE3118889A1

    公开(公告)日:1982-03-25

    申请号:DE3118889

    申请日:1981-05-13

    Applicant: GEN ELECTRIC

    Abstract: Interaction of ethylene glycol with a preformed polyesterimide resin at elevated temperatures forms mixtures homogeneous and clear at room temperature and also soluble in non-polluting solvents, such as monoethers of glycols.

    7.
    发明专利
    未知

    公开(公告)号:DE3675741D1

    公开(公告)日:1991-01-03

    申请号:DE3675741

    申请日:1986-09-23

    Applicant: GEN ELECTRIC

    Abstract: Carboxy-terminated prepolymers are prepared by the reaction of a diamine, preferably an aromatic diamine, or a mixture thereof with a triamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride. The prepolymers, or functional derivatives thereof, are then reacted with a diisocyanate or diamine, or a mixture thereof with a triisocyanate or triamine, preferably an aromatic diisocyanate, to produce copolyamideimides. The products prepared using triamines or triisocyanates are crosslinked. Other products containing alkyl or alicyclic groups attached to aromatic radicals can be oxidatively crosslinked, e.g., by heating in air.

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